1999 V70R Aircon issues

Shug · Jul 8th, 2018, 19:34

Hi all,

Now a proud owner of a V70R. Air con regarded before I collected car, working fine. Drove it home on Friday, air con gave up on way. Just had it vacated, tested ok, oil/die and regarded. Working lovely. Driving home got to a roundabout, enthusiastically pulled out and immediately the air con quit on me, failing to work again. Any pointers? No visible leaks under bonnet using UV light. Not sure if system still contains gas. It still did have gas in it today but not sure how much.

Any advice greatly appreciated, I am in Woking, Surrey is anyone knows any good places for a/c repairs with good reputation.

Cheers.

Hugh.

Shug · Jul 8th, 2018, 22:53

Update time, temp has dropped now, and thought I would try A/C, its working again, I assume there is a temp sensor that cuts out the A/C when under bonnet or engine temp rises too high, I guess this may be faulty, any suggestions on my thoughts?

Cheers

Martin Cox · Jul 8th, 2018, 22:57

I'd suggest the clearance on the electromagnetic clutch on the compressor pulley may be excessive. The usual symptoms are that the air-con works fine at first then after a short while, the clutch won't pull in so no cooling. Once it cools down, it works perfectly again; for a short while.

The usual cure is to remove a shim from the clutch reducing the clearance. There is a much fuller explanation elsewhere on this forum.

Martin

Shug · Jul 9th, 2018, 03:23

Hi Martin,

Brilliant I will look into that.

Hugh

Bigfella666 · Jul 9th, 2018, 08:46

Hugh

What a shame - I was in Horsell on Saturday / Sun morn - missed the opportunity to lend a hand !

The aircon on my 98 R ( which you missed the opportunity to admire ) does not turn on at all - one of those topics I hand over to those with the knowledge and the kit to repair

Martin Cox · Jul 9th, 2018, 22:42

This is lifted from one of my posts from about a year ago. It may be of some help.

"A classic symptom of too great a clutch clearance with the V70 is that the aircon will work perfectly for the first few minutes and then simply stop. When everything has cooled down again. it all starts working again; for a few minutes.

What's happening is that as the clutch coil warms up, it's resistance increases; the resistance of most metals increases as the temperature rises. As the resistance increases, the current through the coil reduces and with it the magnetic field it can produce. Eventually it cannot produce enough magnetism when hot to pull in the clutch and the aircon stops working. Needless to say the problem is worse in hot weather.

Fortunately the clutch on these compressors is adjustable. It's a long time since I've done it and my memory is a bit hazy as to the detail.

Basically there is a nut on the end of the compressor shaft that retains the outer clutch plate. You can undo the nut and there are three M6 threaded holes in the clutch plate that can be used with a suitable puller to pull off the clutch plate. There are some shims on the shaft and it's simply a matter or removing enough shims to restore the clutch plate clearance to normal and then putting it all back together again. Access can be a bit tight but it is doable. I'm sure you'll find a much better description than this elsewhere in the forum."

Martin

1998 V70 Tdi Auto
2008 V70 2.4D

CNGBiFuel · Jul 10th, 2018, 10:24

There's Youtube videos on this. Did mine with three cable-ties and child labour (call Social Services immediately). After fighting it for an hour, my 12YO boy's small hands had it down in 20 mins

snarkosnarko · Jul 10th, 2018, 10:41

Did a reshim on one of these yesterday, gap was over 1 mm, pump was off the car so a lot easier.

Made a puller from an old brake pad, instructions are on here somewhere.

There are 3 shims inside, two fat one thin, ended up just needing the thin one.

Gap now within spec 0.3-0.4mm

CNGBiFuel · Jul 10th, 2018, 11:19

Yes, that's the proper and thorough way to do the job, but means removal from the car and a re-gas. Money and time no object, that is how I should have done it.

I'm off to set a fire in the corral and cook my beans.

Shug · Jul 10th, 2018, 19:51

Thanks everyone for taking the time out to reply, I assume it’s easy measure the gap? Between the pulley and the end plate?

Jul 8th, 2018, 19:34	#1
Shug Member Last Online: Yesterday 12:25 Join Date: Dec 2008 Location: Ligh****er	1999 V70R Aircon issues Hi all, Now a proud owner of a V70R. Air con regarded before I collected car, working fine. Drove it home on Friday, air con gave up on way. Just had it vacated, tested ok, oil/die and regarded. Working lovely. Driving home got to a roundabout, enthusiastically pulled out and immediately the air con quit on me, failing to work again. Any pointers? No visible leaks under bonnet using UV light. Not sure if system still contains gas. It still did have gas in it today but not sure how much. Any advice greatly appreciated, I am in Woking, Surrey is anyone knows any good places for a/c repairs with good reputation. Cheers. Hugh. __________________ Hugh '01 S40 T4 S With Prins VSi LPG - '03 V40 T Sport Lux With Prins VSi LPG - '05 C70 T GT (Auto) With Prins VSi LPG - '09 XC60 D5 SE (Auto) - '12 V50 SE Lux Drive.

Jul 8th, 2018, 22:53	#2
Shug Member Last Online: Yesterday 12:25 Join Date: Dec 2008 Location: Ligh****er	Update time, temp has dropped now, and thought I would try A/C, its working again, I assume there is a temp sensor that cuts out the A/C when under bonnet or engine temp rises too high, I guess this may be faulty, any suggestions on my thoughts? Cheers __________________ Hugh '01 S40 T4 S With Prins VSi LPG - '03 V40 T Sport Lux With Prins VSi LPG - '05 C70 T GT (Auto) With Prins VSi LPG - '09 XC60 D5 SE (Auto) - '12 V50 SE Lux Drive.

Jul 9th, 2018, 03:23	#4
Shug Member Last Online: Yesterday 12:25 Join Date: Dec 2008 Location: Ligh****er	Hi Martin, Brilliant I will look into that. Hugh __________________ Hugh '01 S40 T4 S With Prins VSi LPG - '03 V40 T Sport Lux With Prins VSi LPG - '05 C70 T GT (Auto) With Prins VSi LPG - '09 XC60 D5 SE (Auto) - '12 V50 SE Lux Drive.

Jul 9th, 2018, 22:42	#6
Martin Cox VOC Member Last Online: Today 07:15 Join Date: Dec 2001 Location: Hull	This is lifted from one of my posts from about a year ago. It may be of some help. "A classic symptom of too great a clutch clearance with the V70 is that the aircon will work perfectly for the first few minutes and then simply stop. When everything has cooled down again. it all starts working again; for a few minutes. What's happening is that as the clutch coil warms up, it's resistance increases; the resistance of most metals increases as the temperature rises. As the resistance increases, the current through the coil reduces and with it the magnetic field it can produce. Eventually it cannot produce enough magnetism when hot to pull in the clutch and the aircon stops working. Needless to say the problem is worse in hot weather. Fortunately the clutch on these compressors is adjustable. It's a long time since I've done it and my memory is a bit hazy as to the detail. Basically there is a nut on the end of the compressor shaft that retains the outer clutch plate. You can undo the nut and there are three M6 threaded holes in the clutch plate that can be used with a suitable puller to pull off the clutch plate. There are some shims on the shaft and it's simply a matter or removing enough shims to restore the clutch plate clearance to normal and then putting it all back together again. Access can be a bit tight but it is doable. I'm sure you'll find a much better description than this elsewhere in the forum." Martin 1998 V70 Tdi Auto 2008 V70 2.4D Last edited by Martin Cox; Jul 9th, 2018 at 22:43. Reason: Punctuation

Jul 10th, 2018, 10:24	#7
CNGBiFuel Classic P80 1999 BiFuel Last Online: Mar 6th, 2024 00:34 Join Date: Aug 2012 Location: 48mph Middle Lane M4	There's Youtube videos on this. Did mine with three cable-ties and child labour (call Social Services immediately). After fighting it for an hour, my 12YO boy's small hands had it down in 20 mins __________________ Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl**dy blah."]

Jul 8th, 2018, 22:57	#3
Martin Cox VOC Member Last Online: Today 07:15 Join Date: Dec 2001 Location: Hull	I'd suggest the clearance on the electromagnetic clutch on the compressor pulley may be excessive. The usual symptoms are that the air-con works fine at first then after a short while, the clutch won't pull in so no cooling. Once it cools down, it works perfectly again; for a short while. The usual cure is to remove a shim from the clutch reducing the clearance. There is a much fuller explanation elsewhere on this forum. Martin

Jul 9th, 2018, 08:46	#5
Bigfella666 Premier Member Last Online: Apr 1st, 2024 13:31 Join Date: Sep 2015 Location: London	Hugh What a shame - I was in Horsell on Saturday / Sun morn - missed the opportunity to lend a hand ! The aircon on my 98 R ( which you missed the opportunity to admire ) does not turn on at all - one of those topics I hand over to those with the knowledge and the kit to repair

Jul 10th, 2018, 10:41	#8
snarkosnarko Junior Member Last Online: Yesterday 15:20 Join Date: Mar 2007 Location: nuneaton	Did a reshim on one of these yesterday, gap was over 1 mm, pump was off the car so a lot easier. Made a puller from an old brake pad, instructions are on here somewhere. There are 3 shims inside, two fat one thin, ended up just needing the thin one. Gap now within spec 0.3-0.4mm Last edited by snarkosnarko; Jul 10th, 2018 at 10:42. Reason: sorry pictures not uploading

Jul 10th, 2018, 11:19	#9
CNGBiFuel Classic P80 1999 BiFuel Last Online: Mar 6th, 2024 00:34 Join Date: Aug 2012 Location: 48mph Middle Lane M4	Yes, that's the proper and thorough way to do the job, but means removal from the car and a re-gas. Money and time no object, that is how I should have done it. I'm off to set a fire in the corral and cook my beans. __________________ Bifuel V70 Classic 1999 [The Old Grumpy in the Corner, "When I was a lad... blah, bl*dy blah."] Last edited by CNGBiFuel; Jul 10th, 2018 at 11:25.*

Jul 10th, 2018, 19:51	#10
Shug Member Last Online: Yesterday 12:25 Join Date: Dec 2008 Location: Ligh****er	Thanks everyone for taking the time out to reply, I assume it’s easy measure the gap? Between the pulley and the end plate? __________________ Hugh '01 S40 T4 S With Prins VSi LPG - '03 V40 T Sport Lux With Prins VSi LPG - '05 C70 T GT (Auto) With Prins VSi LPG - '09 XC60 D5 SE (Auto) - '12 V50 SE Lux Drive.

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